Car-rocking device



Dec. 3, 1940. M RASCH 2,223,576

CAR-BOOKING DEVICE Filed Aug. 3, 1939 5 Sheets-Sheet 1 Wawy; 222.25m R'ATTORNEY.

" J5 MLASUHING ltHNizl Dec. 3, 1940. M.y RASCH 2,223,576

CAR-ROGKING DEVICE Filed Aug. 3, 1959 5 Sheets-Sheet 2 INVENTOR.

C/b BY ATTONMEY.

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CAR-ROCKING DEVICE l Filed Aug. 3, 1939 3 Sheets-Sheet 3 l\\\\ P* l@Hummm "uw UNITED STATES PATENT OFFICE CAR-BOOKING DEVICE Martin Rasch,Chicago, Ill., assigner to Chicago Jack Company, a corporation ofIllinois Application August 3, 1939, Serial No. 288,141

3 Claims.

My invention relates to car-rocking apparatus and similar devices.

My invention relates more particularly to apparatus of the typedescribed adapted for use in servicing or lubricating and greasing theunder parts of automotive vehicles and especially for greasing thesprings and spring shackles.

In greasing springs and spring shackles in the manner I have mentioned,it has been found that the grease or other lubricant will penetratebetween the spring leaves and around the shackle bolts more readily anduniformly if the automobile frame is vibrated during such greasing.

Accordingly, I have provided an improved carrocking device capable ofbeing used in the usual greasing pit, auto lift or ramp of a garage,automobile repair shop or service station, to provide a rocking actionto the vehicle being lubricated while over the grease pit, auto lift orramp.

The principal object of my invention is to provide an improvedconstruction of car-rocking device capable of operation by compressedair to provide the necessary intermittent up and down movement at thedesired rate of speed.

A further object of my invention is to provide an improved apparatus ofthe type described that can be easily moved about in the greasing pitupon rollers provided adjacent its base, yet which rollers are removedfrom the floor of the pit when the apparatus is being used.

A further object of my invention is to provide an improved constructionof apparatus of the type described including means for angularlydisposing the apparatus upon a sloping floor of a greasing pit in such aposition that the saddle or yoke which raises the car will be supportedin an absolutely vertical position.

A further object of my invention is to provide a car-rocking devicehaving improved saddle adjusting means including a quick adjustment toapproximate height and an adjusting screw member for minute adjustment.

A further object of my invention is to provide an improved Icar-rockingdevice that is easily and simply constructed, yet so designed that itwill give long Wear and be capable of considerable abuse withoutbecoming broken or out of order.

Other objects and advantages will be more apparent from the followingdescription wherein reference is had to the accompanying three sheets ofdrawings, upon which Fig. 1 is a side elevational view of my lmprovedcar-rocking device;

Fig. 2 is a plan sectional View of the adjusting means for the saddle;

Fig. 3 is a fragmentary sectional view of the upper portion of thecar-rocking device including an adjusting means for the saddle;

Fig. 4 is a fragmentary side elevational view of the top of the supportmember and the saddle;

Fig. 5 is a plan sectional View taken generally on the lines 5-5 of Fig.1;

Fig. 6 is a vertical sectional view through the cylinder and controlmeans for the piston taken generally on the lines 6-6 of Fig. 5;

Fig. '7 is a side elevational view of the cylinder cover piston andvalve release mechanism;

Fig. 8 is a side elevational view of the cylinder cover with partsbroken in section to show the Valve control means;

Fig. 9 is a fragmentary sectional view oi a modif-led form of cylinderwith a solid base, and

Fig. 10 is a fragmentary sectional View taken generally on the linesIII-I of Fig. 5.

In the embodiment of the invention which I have chosen to illustrate, Ihave shown a cylinder I0 supported upon a base member I2 and providedwith a source of air under pressure through a conduit I4. The assemblymay include generally the piston I6, a support member I8 rigidly securedthereto and extending upward through the cover 20 of the cylinder. Thesupport I8 may have associated therewith the adjusting means 22, a topbar 24 rigidly connected thereto, and a removable saddle or support bar26.

Referring to Figs. and 6, the cylinder III may be provided with a baseportion 28 that has a lateral encircling ange 30 and the partiallyrounded bottom wall portions 32. 'I'he bottom of the cylinder may besupported in a base member 34 which is provided with a seat 36`complementary to the wall 32 and provided with a fiat bottom wall 38. Aplurality of ridges 40 may be provided in the bottom wall of the base 34for better gripping upon the floor of the greasing pit or floor belowthe lift or ramp. The base 34 may also `be provided with an uprightencircling flange 42. A ring member formed of the parts 44 and 44a. aresecured to the base 34 by' suitable bolt members 46 and lock the baseloosely to the cylinder I0. Thus with the arcuately shaped surfaces 32and 36 of the bottom of the cylinder and the seat of the base, it can beseen that the cylinder may be tilted in any direction a number ofdegrees so that in the event the base is positioned upon an inclinedfloor as is usually found in a greasing pit or floor below a lift orramp, the cylinder may still be positioned so that the support I8 willrise in a strictly vertical plane.

As previously mentioned, air from a source of pressure may be suppliedto the cylinder I through the conduit I4, valve 48 and elbow 50 to apassageway 52 in the cover plate 20. The air may enter a. chamber 54within which a ball check valve 56 and retaining spring 58 are located.When the ball 58 is moved from its seat 60 as will be hereinafterdescribed, the air may pass into chamber 6| and upwardly throughpassageway 62 and enter a horizontal passageway 64 which communicateswith a passageway 66 in the vertical wall of the cylinder |0. Thispassageway communicates with a horizontal passageway 68 adjacent thelower end of the cylinder I0 and enters the chamber 'I0 below the pistonI6.

In this manner the piston I6 under the action of compressed air willraise in the cylinder, carrying with it the support member I8 that isxedly attached thereto. The piston I6 may be of the usual type includinga cup leather Ia secured to a backing plate |6b by means of screwmembers |6c. The support member I8 may pass upwardly through suitablebearing portions 20a. and 20h in the cover plate 20 of the cylinder. Thesupport may be guided and prevented from rotation by a bo-lt member I2which extends through an elongated slot 'I4 in the support member I8.

In order to secure a continuous intermittent up and down action of thepiston I6 in the chamber I0 of the cylinder, I provide a valve mechanismwhich may include a lever 16 pivotally connected to the piston backingplate |6b and also pivotally connected to an arm I8 which is pivotallyconnected upon the bolt 8| of the bearing portion 20a of the cover plate20. The arm 18 may carry a spring assembly 80 which may generallyinclude a hollow arm 80a, pivoted upon the arm 18 and a pivotallymounted rod member 8017 pivotally mounted upon a toggle member 82. Thetoggle member 82 is keyed to the bolt 8|. A coiled spring 80e normallyrests between suitable shoulders on the members 80a and 80b and servesto hold the end of the bolt 8| in the position shown in Figs. 6 and 8.The bolt 8| (Fig. 6) is formed with an extension 8| a which normallybears against the shoulder 83 with its opposite face bearing against aball check valve 84. During the time, however, that air is entering thelower end of chamber 10, the extension 8| a is pushing on the ball valve83 and rod 90 to move the ball valve 56 from its seat, thus permittingair to travel through the passageways 62, 64, 66, 68 and into the lowerend of the chamber. As the piston I6 is raised in the cylinder, carryingthe arms '|6 and 18 with it, the member 80h telescopically mounted inthe hollow arm 80a, moves forward; the spring is compressed until thepivot of the member 80a is raised to a point near the horizontal, where,by the action of the compression spring 80e, it will be snapped upwardpast a horizontal point, and the portion 8|a of the bolt 8| will beswung forward against the wall 83 in the cover, to the position shown inFig. 6.

'Ihe adjusting screw 9| mounted in the cover, provides a stop againstthe member 82. Thus, in the position of the valve mechanism shown inFig. 6, air in the chamber I0 below the piston, may pass throughhorizontal passageway 68 upwardly through the passageways 66 and 64acrossthrough the horizontal passageway 92, down through the passageway94 p-ast the check valve 96 and its spring member 98 and into the upperend of the cylinder through the opening 99. This permits the piston todescend in the cylinder chamber and the air may escape through the slot'I4 which is in support member I8. When it is desired to use thecar-rocking device as a jack, the adjusting screw 9| may be screwed downin the cover 20 so that its end rests upon the top of member 82, thuspreventing the valve mechanism from working.

'I'he support member I8 may extend upwardly through the cover 20 of thecylinder I0 and have a collar |02 connected thereto by means of a setscrew |04. The collar |02 is formed with an annular groove |06 in itsoutside periphery to receive a pair of bolt members |08 that arefastened to a downwardly depending annular ange IIO formed integral witha hand wheel I2. A bearing washer ||4 may be positioned between an uppersurface of the collar |02 and a lower surface of the hand wheel II2.

'I'he hand wheel ||2 may carry a pair of dog members ||6 mounted onsuitable pivots ||8 in upwardly standing ears |20 on the hand wheel 2.The toothed portion of the dog members I6 is normally pressed in aforward position by a compression spring |22 positioned between anextension of the dog and the surface of the hand wheel I|2.

The dog members ||6 are adapted to engage the teeth |24 of a ratchetmember |26 which is telescopically mounted in the support I8 and eX-tends upwardly through a suitable axial opening in the hand wheel 2. Therack carries at its upper end a cup-shaped housing |28 which is formedwith an annular flange |30 to receive bolt members |32 that secure thesame to the annular flange |34 of an elongated cup-shaped screw housing|36. The housing |36 is provided with an axial screw threaded opening|38 through its upper end to receive a screw member |40. The screwmember |40 carries at its upper end the top bar 24 upon which the saddleor supporting member is positioned. It will be noted that the top bar 24is formed with a socket 24a to receive a centering stud 26a on thesaddle. The saddle is further provided with downwardly depending ears26h which straddle the bar 24, thus effectively preventing displacementor removal of the saddle 26 from the bar 24 when in use, yet permittingthe same to be easily removed manually by lifting the saddle from thebar.

From the above description of the adjusting means, it will be apparentthat by grasping the member |36, the bar |26 may be raised in thesupport member I8 to a point adjacent the lower part of an automotivevehicle to be raised. Minute adjustment can then be obtained by turningthe hand wheel ||2 and revolving the rlxlmber |36 about the stationaryscrew member In order to provide the convenience of being able to movethe car-rocking device about without lifting and carrying the same, Ihave provided the wheel members |42 mounted upon a shaft |44 carried bya pair of lugs |46 that are formed integral with the base member 34. Inthis way it can be seen that by slightly tilting the car-rocking device,the wheels will come in contact with the surface upon which the same ispositioned and the car-rocking device may be rolled about from oneposition to another with comparative ease.

The cylinder I0 as shown in Fig. 6 may be provided with the plug members|0a. and |0b so that the chamber 'l0 may be accessible for cleaning orother purposes when desired.

In Fig. 9 I have shown a modified form of the invention in which theWheels |42 are directly mounted upon the lower end of a cylinder M8. Inthis construction no sub-base 34 is provided. Since it is desirable inthe trade and especially where inclined surfaces are not encountered inpits, to provide a cylinder which is not furnished with an auxiliarybase, I also contemplate the provision of the form of cylinder shown inFig. 9.

From the above and foregoing description it will be apparent to thoseskilled iny the art that I have provided a highly improved car-rockingdevice, one that is easily operated by the average attendant in gasstations, garages or repair shops and one that will not easily becomebroken or out of order.

While I have illustrated and described a specie embodiment of theinvention, it will be apparent tov those skilled in the art that changesand modifications may be made in the exact details shown, and I do notWish to be limited in any particular, rather what I desire to secure andprotect by Letters Patent of the United States is:

1. Apparatus of the class described comprising a cylinder having arounded bottom wall, a latera1 encircling flange on said cylinder abovesaid bottom wall, a base having a seat to receive said bottom wall and aflat bottom surface, an upright encircling flange on said base, a ringmember secured to said upright iiange overlying the lateral flange ofsaid cylinder and loosely connecting said cylinder and base, a pair ofwheels mounted on the side of said base, said cylinder having areciprocating piston thereon, a source of compressed air for saidcylinder, valve means therein for directing compressed air alternatelybelow or above said piston, a support member secured to said piston andextending upward through said cylinder, adjusting means associatedtherewith for changing the length of the same and a removable saddlepositioned on the upper end of said support member.

2. Apparatus of the class described comprising a cylinder having arounded bottom wall, a lateral encircling flange on said cylinder abovesaid bottom wall, a base having a seat to receive said bottom wall and aflat bottom surface, an upright encircling flange on said base, a ringmember secured to said upright flange overlying the lateral flange ofsaid cylinder and loosely connecting said cylinder and base, saidcylinder having a reciprocating piston thereon, a source of compressedair for said cylinder, valve means therein for directing compressed airalternately below or above said piston, a support member secured to saidpiston and extending upward through said cylinder, adjusting meansasso-` ciated therewith for changing the length of the same and aremovable saddle positioned on the upper end of said support member.

3. Apparatus of the class described comprising a cylinder having arounded bottom wall, a lateral encircling ange on said cylinder abovesaid bottom wall, a base having a seat to receive said bottom Wall and aflat bottom surface, an upright encircling flange on said base, a ringmember secured to said upright flange overlying the lateral ange of saidcylinder and loosely connecting said cylinder and base, said cylinderhaving a reciprocating piston thereon, a source of compressed air forsaid cylinder, valve means therein for directing compressed airalternately below or above said piston and a support member secured tosaid piston and extending upward through said cylinder.

MARTIN RASCH.

